A) Ethene B) Methane C) Sulphur D) Hydrogen
A) Benzene B) Propane C) Pentane D) Hexane
A) sublimation B) decomposition C) reduction D) oxidation
A) filling the orbitals with lower energy first B) quantity of electrons in the valence shell C) the filling of degenerated orbitals D) quantum numbers of electrons
A) they belong to the same period B) nitrogen is less dense than oxygen C) oxygen is more reactive than nitrogen D) of the difference in their boiling points
A) 2.00gdm−3 B) 8.00gdm−3 C) 0.08gdm−3 D) 80.00gdm−3
A) double anions in its aqueous solution B) hydrogen ions in its aqueous solution C) a single cation in its aqueous solution D) hydrogen atoms in its aqueous solution
A) reaction vessel feels cool during the reaction B) heat of formation of reactants exceeds heat of formation of products C) bond forming energy exceeds bond breaking energy D) enthalpy change is negative
A) HCl B) NH3 C) CH4 D) NaH
A) C2H4 B) C4H8 C) C3H6 D) C3H4
A) 66.0g B) 96.0g C) 76.0g D) 80.0g
A) nuclear charge decreases while the distance of the valence shell from the nucleus is increasing B) nuclear charge decreases while the outermost electrons are drawn closer to the nucleus C) valence electrons increase across the period while the valence shell remains constant D) nuclear charge increases while the outermost electrons are drawn closer to the nucleus
A) +4 B) +2 C) +3 D) +5
A) Na B) Mg C) K D) Al
A) distance of the outermost electron(s) from the nucleus B) size of the positive nuclear charge C) screening effect of the inner electron(s) D) ability to attract shared electron(s)
A) Hydrogen bond is formed between a metal and a non-metal B) Covalent compounds would readily ionize in solution C) Covalent compounds consist of ions D) Ionic compounds in solution would conduct electricity
A) high melting point B) durability C) hardness D) octahedral shape
A) Heat energy is absorbed B) It occurs reversibly C) A catalyst is required D) Activation energy is high
A) 10.00 B) 1000.00 C) 0.01 D) 100.00
A) have same density B) form carbon(IV) oxide on combustion C) have octahedral shape D) conduct electricity
A) a base B) an oxidizing agent C) an acid D) a reducing agent
A) dehydration B) decomposition C) ozonolysis D) hydrolysis
A) 0.0245g B) 0.049g C) 0.490g D) 0.245g
A) distilling it B) decreasing the external pressure C) reducing its quantity D) increasing the external pressure
A) 0°C B) 20°C C) 30°C D) 40°C
A) precipitates and the solution remains unchanged B) dissolves and crystals are formed C) dissolves and the solution becomes super saturated D) dissolves and the solution becomes unsaturated
A) propanol B) propanoic acid C) propane D) propyne
A) electrolytic reactions B) mechanism of electrolysis C) electrolytic reactions D) nature of the electrode
A) 2px B) 3s orbital C) 1s orbital D) 2s orbital
A) carbon(IV) oxide B) water C) fire blanket D) sand
A) Formation of salt and hydrogen gas with reactive metals B) Evolution of carbon dioxide gas when added to a trioxocarbonate (IV) salt C) Formation of salt and water with alkalis D) Evolution of ammonia when heated with ammonium salts |